Multiple UV Maps For 1 Object
Blender allows multiple images to be assigned in one UV Map. If I'm not mistaken you want one set of UVs, just across multiple textures. To do this select only the faces you want to use a specific texture, and in the UV/Image Editor click the "browse image to be linked" rollout, and select the that texture.



This will map any faces you have currently selected to that texture in the "textured" viewport shading mode.

Alternatively, in the UV/Image Editor use "image > open image" to open an image file not already linked to the blender scene, or the + icon to make an internal image.

If you want to render this object or export it to another application, not just view it in the "textured" viewport, you will need to assign a material to your faces, and assign your texture to that material.